Constellation Energyvs.Duke Energy
CEG vs DUK · both in Utilities & power producers, part of the Energy, grid & critical infrastructure value chain: Electricity utilities and large power producers, from nuclear to renewable portfolios.
Constellation Energy and Duke Energy are similar in size by market cap; Duke Energy trades at the lower P/E (17.2 vs 29.1); year to date, Duke Energy leads (−1.5% vs −15.2%).
Side by side
| CEG | DUK | |
|---|---|---|
| Market cap | $101B | $90.3B |
| Price | $285.07 | $116.84 |
| Today | −4.8% | +1.2% |
| Return YTD | −15.2% | −1.5% |
| Return 1Y | −16.4% | −8.0% |
| Since June 26, 2026 | +8.0% | −9.0% |
| P/E | 29.1 | 17.2 |
| P/S | 3.2 | 2.7 |
| P/B | 3.2 | 1.6 |
Data as of 2026-10-08 · updates daily after U.S. close
Since June 26, 2026: the change in the closing price, from the daily closes Sectivia records itself since that date.
The two companies
Constellation EnergyCEG
No US company generates more nuclear power. Its carbon-free baseload increasingly goes to data centre operators on long-term contracts, the clearest case being Microsoft's deal to restart Three Mile Island.
Full CEG profile →Duke EnergyDUK
A large US utility carrying a substantial nuclear fleet into a period of demand growth from electrification and data centres.
Full DUK profile →More CEG & DUK comparisons
Other head-to-heads in the Utilities & power producers segment.